ISOPRENE COPOLYMER, AND MANUFACTURING METHOD FOR SAME

摘要

Provided are a copolymer having the properties of natural rubber (durability (anti-fracture properties, abrasion resistance and anti-crack-growth properties), and a manufacturing method for same. An isoprene copolymer having a styrene block or a butadiene block at a terminal thereof, wherein styrene monomers account for less than 5 mol% of the total monomers forming an isoprene copolymer having a styrene block, butadiene monomers account for 10 mol% or less of the total monomers forming an isoprene copolymer having a butadiene block, and the cis-1,4 bond content of isoprene-originated components is at least 95% in total.